The dev probably likes the Akane personality a lot that dialogue from the dev is legit like another Akane dialogue 🤣
natsuki is more open compared to Akane who is harsh to the MC on the outside, but is kind to everyone else(and obviously likes the MC) she is also a bit shy near her loved ones(+i would assume the the personality that the game dev used in the 0.4.3 for the black Smith shop, the dev used a sentence to give away who he/she was acting as, one of it is "and its not like I've done this for you" which matches the tone and dialogue of Akane)